The wave of illegals now flooding into the U.S will keep growing — and keep causing harm to Central American children — until the president starts leading a response, according to a White House immigration adviser.

“There’s a lack of leadership here… [but eventually] the president will become involved because he can’t avoid it,” said Rev. Richard Ryscavage, who serves on the White House immigration advisory panel.

That wave is building fast, and is already likely to be 50 percent larger by October than officials predicted one week ago, according to a leaked administration memo.

Officials hid the fast-growing migration crisis from the media because they’re still trying to pass a very unpopular immigration rewrite, said Ryscavage, who is a member of a new White House panel that was established last week by Obama to help deal with the wave of youth immigrants.

“That’s the [administration’s] priority — to get that Senate-type bill passed,” said Ryscavage, who is the director of the Fairfield University’s Center for Faith and Public Life.

“To be frank, they tried to hide this problem for a while” to minimize opposition to the Senate bill, he said. “They didn’t do did anything in public about it, they didn’t want to tell anyone about it… [and] they’re now in stage where they’re feeling ‘We have to figure out a strategy.’”

“That’s what the administration is most afraid of — that it will derail any discussion of reform of the immigration laws,” he said.

But Obama’s effort to hide the problem is endangering many Latino children as they travel northwards though Mexico, through gangs and corrupt cops, Ryscavage warned.

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